Actually upon closer inspection it appears that the barrel jack is a mono sound output ? but I am not a big fan of assumptions Looks like VIN (3.3 - 5V is down at the USB end but I would still prefer to read through some documentation please)
Another assumption - the barrel jack is for headphones ? but can I also input this into a small amplifier please ?
Thanks for the additional info Oliver. I have a few friends that run Macbook repair business’ and they are using these to play the Macbook start-up sound activated by a reed switch when customers enter their shop. Very cool
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